Tuyere



(No Model.)

\ N. DIDIER.

. TUYERE. A No. 252,305. Patented Jan. 17,118.82.`

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ATTORNEY.

. UNITED 'i STATES PATENT OEEICE.

NIOOLASDIDIER, OF PITTSBURG, PENNSYLVANIA.

SPECIFICATION forming part of Letters` Patent No. 252,305,'dated January 17, 1882.

I Application filed August 10,1881. ,Nomodel.) f

Toenable others to fully understand the conf stlucton of my improved tuyere, I will proceed to describe it by reference to the accompanying drawings, wherein- Figure l represents a. longitudinal central section ot' such a tuyere as is contemplated in my invention; Fig. 2, an outside view of the .bottom or rear end.

Tro construct a tuyere inwaccordance with my invention I procure two sheets of copper and jbend each into the form of a frustum of a cone,

and bring `about a perfect uniongof theirfrespective long edges by the operation known as brazing77 The smallest, A, of these conical cylinders is to bc arranged concentrically within the larger,vB, by whichV an annular t the metal take place, which materially stili'- en, strengthen, and increase the durability ot' that part of the tuyere. rIhe water-space C at the largest ends `of these shells A B is closed by a circular or ring-shaped cap, E, having in its face two deep annular concentric grooves, a u., corresponding in position and size with the approximate ends of the respect- Vive shells, and into which they are fitted, and

the joint made perfectly water-tight by means of suitable packing. To hold the cap E firmly to the shells, and in a manner that will admit of ready removal, it is requisite that the cap should be held by screws, and to this end, at regularintervals through the shells and their intermediate water-space, I have inserted a number` of radially-4 arranged short bars or strong rivets, e e, each passing through a properly-shaped eyebolt, d, the screw ends ot' which extend outwardly through the cap E, severally terminati-ug in appropriate nuts.

The tuyere, as described, is provided with the usual supply and discharge pipes that pass through thecap into the water-space. In this `case the outlet-pipe F simply enters the waterspace, while the supply-pipe Gr is continued through such space to a point near the nose end of the tu yere. The proper position or relation of both ot' these pipesis maintained with respect to the face-plate E and other portions of the tuyere each by means of a surrounding Vflange, h, and intermediate packing byV such binding-screws it' as are generally used in joints of this character. l

'The nature and object 'of watertuyeres for use in furnacesbeing so well known and understood, no further description is herein deemed t necessary, believing that I have made the construction of my improved tuyerc sufficiently plain. I clai'ni- 1. The tuyere formed of two conical-concentric thin sheet-copper shells with an annular water-space between them, in combination with a removable ring-shaped cap, E, held thereto by means of two or more eyebolts that enter such water space and connect each with an appropriate radially-arranged short bar or rivet, substantially in the manner shown and set forth.

2. A tuyere formed of two conical concentric thin sheet-copper shells, the outer one of which is curved inwardly at its smaller end and made to join the inner shell at that point, by which a convex nose is given the tuyere, as set forth.

3. A tuyere formed of two conical concentric thin sheet-copper shells, provided with a convex nose integral with the outer shell, and made thicker at the' convex portion.

NICOLAS DIDIER. Witnesses:

J osIAII W. ELLs, J. H. CALLAHAN. 

